Log Message:
netsurf: Update to 3.10

pkgsrc changes:
 - Remove patch-netsurf_content_handlers_html_html__interaction.c,
   patch-netsurf_utils_config.h, patch-netsurf_frontends_gtk_download.c: all
   present upstream now

Changes:
NetSurf 3.10 features many fixes, better performance and improved
functionality. In particular, handling of authentication, certificates
and fetch errors have been updated and unified. The GTK front end has
had a major overhaul too.